Singing on the subway, a young Argentine woman aspires to dedicate her life to music, just like the U.S. pop star she deeply admires.Singing on the subway, a young Argentine woman aspires to dedicate her life to music, just like the U.S. pop star she deeply admires.Singing on the subway, a young Argentine woman aspires to dedicate her life to music, just like the U.S. pop star she deeply admires.